Dumping-car door.



J. M. ROHLFING.

DUMPING GAR DOOR. APPLIOATION'FILED AUG. 23, 1910.

Patented Dec. 17, 1912.

a SHEETS-SHEET 1.

' J. M. ROIHLPINGQ DUMPING GAR noon. APPLIOATIOII FILED AUG. 23, 1910.

3 SHEET8SHEET 2.

Patehted Dec. 17,

. To all whom it may concern:

1 to er'sons skilledin the art.

. L-i i d-p n w h t .Jfii-at temra 6. flhe: inner face of outer por"UNITED STATES PATENT cl rion,

Join; M. ROHLFING, or en LOUIS, nissoum, ASSIGNOR'TO AMEKIGAN- can ANDroummv COMPANY, or sr. Louis, MISSOURI, A CORPORATION or NEW'QTERSEY.

numrmd chn noon;

- Beit known that I,JHN ROHLFING,

Specification of Letters-Patent; Patented Dec, 17 Application filedAugust 23, 1910 Serial he. 578,568.

'residingat St. Louis, Missouripancl being -avcitizen of the UnitedStates, have invented w 5 certain new and useful Improvements inDumping-Car Doors, ofwhich the follow full, clear, and exactdescription, such as will enable others skilled in the art to-which it apertains. to make and to use com anying drawin which illustrate the preerred. form of t e, invention, though it 1s. .to'be understood that-theinvention is not limited to the exact details of-construc tion shown.and described, as itis obvious thatvarious modifications "thereof willoccur u said Figure 1 is a view in slde elevatlonfl-ofa fra ent-roi acar emtion. igs. 2"a'nd 3 are transverse, vertical its closed pos tionin Fi 3'. I,

Y Referringtothe drawings by numerals, 1

indicates one of the center sills of a flat bottom ca'r, 2-the bodybolster thereof, and '3 a floor beam or other eross bearer, ,a door 4being disposed between-bolster 2 and beam 3, and similar doors beingarranged between the several cross bearers throu bout the length of thecar and at -both si es of the center sills. V Y v Each door 4="is hingedat its'inneredge, as at 5', t'o'its respectiveadjacent center S111, andthe'outer edge of, each door is provided with a pair ofdepefidinggspacedbrackets 6, 6' each terminating inan outwardlyprojecting bifurcated portion 7, said bifurcated portion extendingoutwardly of 'said brackets beyond. the-dotted'line fiof Figs: 2 and '3,and within this .latterf'portion and between the arms eithe -bi] videdextendsthefloweimfn'erend of a semi-circular Kor parti-circularslidablelink 8.. Link 8 is formed longitudinally with an arcuate' slotfiddnd a" in through and through i;

earms oi the hirer- 1q-thei'samefre erence' being had. to the acbodyinthe features 0 the present invenP reation thus pro- 0' E extends,thereracket '6 while leaving the IinE- free for ag" tion of link 8. isformed with serrations or. A

teeth 11, and the upper end of the link is formed with anvofisetbifurcated portion 12 through the arms of which bifurcation eX- tends apin 13 which latter is engaged by the lower end of a chain 14, whichchain extends within said bifurcated portion l2-of the link. I a

Spaced outside the longitudinal vertical planes of the car occupiedbytbe outer edge of the doors 4 and journaled, in the several crossbearers is a shaft 15 extending in 'a lower plane than said'doors whenthe doors, 1

occupied by the brackets 6, each of said sleeves being fol-med on itsouter surface with a worm adapted to receive and direct the wrapping ofthe respective chain 14, the upper end of said chain being fixed to theouter end of respective sleeve. Th e inner end'of each sleeve 16terminates in a serrated annular collar 17 adapted to receive the upperend of the link 8 and the teeth'or ser-' rations of the collarsl?correspond to and are designed to mesh with the serrations 11 v v oftheir respective links 8.

An operating lever 18- engages shaft 15 4 tate the shaft 15 in adirection for winding up the chains 14 o'n sleeves 16 for closing the adoor, and when the'door has arrived at a closed position,.the.bifurcatdportions 7 of bracket .Gwill lie immediatel "beneath shaft 7 -15 and theupper'ends of t e' links 8 will partly overhang the shaft. A slightaddit1ons-0fthe links to meshwith. the serrational rotationof shaft.15,' throu h the ac- 'tion 'of-chains 14 drawing inwar 1y on the upper.ends of links 8, will cause the serrations of collar17 and to; moveintolsnu'g en- I of the link o'verhahging the shaft and ex- "tendingbeyond the line of gravitation so 50 cationofvportion 7' for straininthe link g'ainst separation from lits; f'respect1ve that'the'strain.ofsustaining the door 4; is

transferred' from the chains directly to the linkswhich are then intheir extendedpogagement' with the shaft, with the upper end sitionwithg' the =pinl10 atthe inner end -of.

slet"9 andfthe sh'essistransmittcd through 5 brackets 6 andlinks toshaft15.- 'Wh en it" lie 70 the transverse, vertical planes of the. car

is desired to open the doors f for dumping the car, the shaft '15 isrotated in a reverse directionsufiiciently to force the upper ends oflinks 8 outwardly until the serrations thereof become disengaged fromthe teeth of collars 17, thereby forcing their lower portions betweenthe bifurcations of the brackets 6, whereupon the door will drop,

due to its weight and the weight of the sustained load, unwinding thechains 14 in its descent. Obviously, slot 9 and the bifurcations of thebrackets 6 are essential in the operation described to accommodate thelongitudinal thrust of link 8 when being brought to the final positionafter closing the door and in being loosened before the door-begins toopen.

lVhat I claim is 1. In a car, the combination with a hinged. door and arotatably mounted shaft, of a winding chain a bifurcated bracketextending, from the door and a cooperating bifurcated slotted linkengaging said bracket between its bifurcation, said link being shiftahlelongitudinally and adapted at times to overhang the shaft.

2. In a car, the combination with a hinged door and a rotatably mountedshaft, of a bracket extending from the door, a cooperating slotted linkengaging said bracket, said link being shiftable longitudinally andhaving a semi-circular recess ada ted at times to fit over the shaft,and a flexible connection between the link and shaft.

In a car, the combination with a hinged bottom door, of a rotatablymounted shaft, a bracket depending from the door and adapted when thedoor is closed to project beneath the shaft, alink', engaging saidbracket and shift-able longitudinally thereof, said link being shaped toconform to the shape of the shaft and adapted to overhang the shaft anda flexible connection between said shaft and said link.

4. In a car, the combination with a hinged door and a rotatablymountedshaft, of a bifurcated bracket extending from the door, acooperating slotted link engaging said bracket, said link beingshiftable longitudinally and adapted at times to overhang the shaft, aflexible connection between said shaft and link, and a serrated collaron said shaft, the link being formed with serration adapted to meshtherewith.

5. In a car, the combination with a hinged door, of a bracket dependingtherefrom, a segmental link formed with an arcuate longitudinal slot, apin carried by said bracket and extending through said slot, a shaft,and flexible means for moving the free portion of the link to and from aposition overhanging the shaft.

6. In a car, the combination with a hinged door, of a bracket dependingtherefrom, a

segmental link formed with an arouate longitudinal slot, a pin carriedby said bracket and extending through said slot, a shaft, and a flexibleconnection between the free end of the link and the shaft, the free endof the link being adapted at times to overhang the shaft.

, 7. In a car door operating device,.the combination comprising a door,a door lifting means, a door locking means including an arcuate slottedlink and a bifurcated door bracket with which said link is in slidableengagement.

8. In a car door operating device, the combination comprising an.operating shaft, a longitudinally shiftable slotted link adapted -toencircle and over-ride said shaft and a door bracket in slidableengagement with said link.

9. In a car door operating device, the combination comprising anoperating shaft, a door and a flexible connection between said door andshaft comprising a longitudinally slidable link adapted to move inwardlyat its upper end over said shaft to lock the door in closed position.

10. In a car door operating device, a door, an operating shaft, aconnection between the shaft and door, said connection including atwo-part ring having a pin and slot connection between the partsthereof, said ring adapted toencircle said shaft to hold the door inclosedposition.

11. In a car door operating device, a door, a shaft, a flexibleconnection adapted to be wound on said shaft, a two-part ring memher inthe plane of movement of said door, one part fastened to the door andthe other part fastened to the connection, and a pivoting and slidingconnection between the parts of the ring, whereby one part may fit belowand the other part rest on said shaft.

12. In a car door operating device, the combination comprising a door, abifurcated bracket pendent from said door, abifurcated portion of thebracket extending beyond the free edge of the door and a link slidablyconnected with the bifurcated portion of said bracket.

13. In a car door operating means, the combination comprising a door, ashaft in a plane lower than said door when the'door is closed, a bracketpendent from said door,

an arcuate link' slidably pivoted to said' bracket, and flexible meansconnecting said link with said shaft. v

14. In a car door operating means, the combination comprising a door, ashaft in a plane lower than said door when the door is closed, anarcuate bifurcated link slidably pivoted to said bracket, and flexiblemeans connecting said link with said shaft.

15.'In a car door operating means, the combination comprising a door, ashaft in a lane lower than said door when the door is closed, a bracketpendent from said-deur,

an arcuate slotted and pivoted link slidably pivoted to said bracket,and flexible mean connectingsaid link with said shaft.

16. Ina car door operating means, the combination comprising a door, ashaft in a plane lower than said door when the door,

is closed, a bifurcated bracket pendent from said door, a slotted andpivoted arcuate link slidably connected with said bracket, and flexiblemeans connecting said link with said shaft.

Copies of this'patent may be obtained for drawn over and engage theupper surface of said shaft.

18. In a car the combination of a hinged door and a rotatably mountedshaft, a chain adapted to be wound on said shaft, a bifurcated bracketaflixed to said door, a longitudinally shiftable slotted link, a pinaffixed to the bifurcations of said bracket passing through said slot,said chain having an end attached to said link, adapted to draw saidlink over said shaft.

In witness whereof I have hereunto set my hand in the presence of twowitnesses.

JOHN M. ROHLFING. Witnesses:

CHARLOTTE MI'rzE, J. H. BRUEGGEMAN.

five cents each, by addressing the Commissioner of Patents, 1Washington, D. G.

